Investments (Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Total Assets	$ 677,457	$ 687,584
Total Liabilities	649,754	657,331
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	692	346
Total Liabilities	143	1
Investment funds (primarily other invested assets) | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	635	282
Total Liabilities	143	1
Renewable energy partnership (primarily other invested assets) | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	57	64
Total Liabilities	$ 0	$ 0